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一般是以一股鋼軌进行計算,这样,道岔上的鋼軌可以继續使用。本文以理論导程不变来計算,則原有单开道岔的配軌必須全部变动,这样作是不太經济的。
It is usually calculated on a single rail so that the rail on the turnout can continue to be used. This article is the same as the theoretical lead to calculate, then the original single-turnout with the track must all change, this is not economical.